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ModuMath Collection
Adding Fractions with Different Denominators: Renaming Fractions
02:06

Adding Fractions with Different Denominators: Renaming Fractions

This clip introduces the concept of adding fractions with different denominators. It explains that this is done by re-naming the fractions so that they have the same denominator, which is accomplished by finding the comm..

Adding Fractions with Different Denominators: Shortcut for Common Denominators, A
04:08

Adding Fractions with Different Denominators: Shortcut for Common Denominators, A

This clip explains a very simple rule: To add two fractions with different denominators, simply multiply through the first fraction by the denominator of the second, and multiply through the second fraction by the denomi..

Adding Fractions with Different Denominators: Summary: Adding Fractions with Different Denominators
01:28

Adding Fractions with Different Denominators: Summary: Adding Fractions with Different Denominators

This clip reviews the topic of adding fractions with different denominators. It explores three ways this can be done, including writing the multiples of each denominator until a common multiple is found; multiplying the ..

Adding Signed Numbers: Adding More Than Two Signed Numbers
02:30

Adding Signed Numbers: Adding More Than Two Signed Numbers

This clip explains that the best way to proceed when adding more than two signed numbers is to add all the positive addends and all the negative addends separately, then add the resulting sums.

Adding Signed Numbers: Adding Negative Numbers
01:49

Adding Signed Numbers: Adding Negative Numbers

This clip explains the rule for adding two negative numbers: to get the absolute value of the answer, add the absolute values of the addends. "As for the sign of the answer," the clip continues, "…it's the same as the s..

Adding Signed Numbers: Adding Numbers With Different Signs
04:53

Adding Signed Numbers: Adding Numbers With Different Signs

This clip explains the rule for adding numbers with different signs. "Subtract the absolute value of the addends to get the absolute value of the answer," the clip advises. "As for the sign of the answer, it's the same a..

Adding Signed Numbers: Adding Positive Numbers
02:19

Adding Signed Numbers: Adding Positive Numbers

This clip explains the rule for adding positive numbers: to get the absolute value of the answer, add the absolute values of the addends. "As for the sign," the clip continues, "…it will be positive…same as the two add..

Adding Signed Numbers: Adding Two or More Numbers With the Same Sign
02:25

Adding Signed Numbers: Adding Two or More Numbers With the Same Sign

This clip explains that when adding two or more numbers with the same sign, to get the absolute value of the answer, we add the absolute value of the addends. "As for the sign of the answer," the clip continues, "…it's ..

Adding Signed Numbers: Exercise in Adding Signed Numbers
01:31

Adding Signed Numbers: Exercise in Adding Signed Numbers

This clip provides exercises to help students better understand how to add signed numbers. It references two rules, one of which is utilized when the signs are the same, the other of which applies when the signs are diff..

Adding Signed Numbers: Pairs of Numbers Whose Sum is Zero
01:15

Adding Signed Numbers: Pairs of Numbers Whose Sum is Zero

This clip explains that any time we add 2 numbers with the same absolute value, but opposite signs, their sum will be zero.

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